Brown sulfur coloring-matters.



UNITED srarns PATENT orat on.

JOSEPH FLACHSLAENDER AND KARL PAUL GRALERT, OF ELBERFELJi-Alllj MAX DUFF, OF VOHVINKEL, NEAR ELBERFELD, GERMANY, ASSIGNORS T FARBENFABBIKEN VORM. FRIEDR. BAYER 6a 00.. 0F ELBERFELD, GERMANY, A CORPORATION OF Patented Dec, 16, 1913.

- GERMANY. i

BROWN SULFUR COLORING-MATTERS.

v 1,081,602. specification of Letters Fatcnt.

in Drawing. Application fl1edOctober10,1912. Serial No. 725,030.

To all whomit may concern:

Be it known that we, JOSEPH Fnacnsnanm on and Khan PAUL Gnlmanr, residing at Elberfeld, and MAX Burr, residing at Voh- Winkel, near Elberfeld, Germany, doctors of philosophy, chemists, citizens of the German- Empire, have invented new and useful. Improvements in New Brown Sulfur Co1or-. 'ing-Matters, of which the following is a specification. p

Our invention relates-to the manufacture andproduction of new and valuable brown sulfur colors which are obtained by treating with alkali polysulfids and copper or copper compounds phthaloperinone having most probably the formula:

b 51 \R in which'R stands for a naphthalene ring containing at least one nitro group.

' The new dyes are after being dried and soluble in concentrated sulfuric acid with a pulverized dark powders soluble in a solution of sodium sulfid generally with a yellowish-brown to red-brown coloration and brown coloration. They dye cotton in bloomy catechu-brown shades distinguished by their fastness to light. a

In order to illustrate the new process more fully the following example is given, the parts being by weight: 130 parts of crystallized sodium sulfid, 35 parts of sulfur, 10 parts of CuSO 25 parts of dinitrophthaloperinone having most probably the following formula:

compounds are heated during 10 hours .to 200 C. The melt is powdered and then ready for use. The dyestutl is a dark powder soluble in a sodium sulfid solution with a reddish-brown coloration. It is soluble in concentrated sulfuric acid with a brown coloration and dyes cotton in pure catechu-brown shades fast to light.-'

The above mentioned quantities of sodium sulfid and of sulfur as well as the tempera- .ture and the duration of the reaction can be var ed within wide limits.

Similar dyestuffs are obtained by using other of the above mentioned products, such as mononitrophthaloperinone etc.

We claim: 1. The herein described new sulfur. dyes being sulfur-containing derivatives of phthaloperinone compounds having most probably the formula:

.in which R stands for'a naphthalene ring i No, no,

5 a brown coloration; dyeing unmordanted lution with a reddish-brown clorationafid 5 soluble in concentrated sulfuric ac/1d with set our hands in the presence, of two subscribing Witnesses.

JOSEPH FLACHShAENDE-R; [1.28.] KARL' PAUL GRKLERT. [14. 8.] MAX BUFF. 1. I Min eases; v HELEN'NUFEB, I ALBERT NUFER.

cotton in pure catechu'-brown shades ,iast 10 light, substantially as described.

In testimony whemof wehaveflhareunm 

